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According to David Tilman, greater the d...

According to David Tilman, greater the diversity, greater is the primery productive. Can you think of a very low diversity man-made ecosystem that has high productivity ?

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The man-made ecosystems like agricultural field of paddy or wheat show very low diversity, by possess high productivity. These are also an example of monoculture.
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Identify true or false statements. Correct each false statement to make it true. (i) Number of species in a community really matter to the functioning of the ecosystem. (ii) David Tilman proved that decreased diversity contributed to higher productivity. (iii) Rich biodiversity is not essential for ecosystem health but required for survival of human race of earth. (iv) Species which are dangerously harmful beings and their interests can be thought of deliberate extinction.

India has a greater ecosystem diversity than a Scandinavian country like Norway. What kind of diversity does it represent?

India is divided into 11 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity . Tropics are rich centre of biodiversity . Warm temperature , high humidity in tropical areas provied favourable conditions through the years . Rich diversity is important for stability , productivity for ecosystems. Which among the following represents diversity at ecosystem level ?

What is so special about tropics that might account for their greater biological diversity? a. Unlike temperate regions subjected to frequent glaciations in the past, tropical latitudes have remained relatively undisturbed for millions of years and thus, had a long evolutionary time for species diversification. b. Temperate environments, unlike tropical ones, are less seasonal, relatively more constant and predictable. Such constant environments promote niche specialization and lead to a greater species diversity. c. There is more solar energy available in the tropics, which contributes to higher productivity, this in turn might contribute indirectly to greater diversity.

India is divided into 11 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity . Tropics are rich centre of biodiversity . Warm temperature , high humidity in tropical areas provied favourable conditions through the years . Rich diversity is important for stability , productivity for ecosystems. When group represents minimum species diversity among vertebrates ?

Read the following five statements (A to E) about biodiversity and select the option with all correct statements: (A) India has more than 50,000 genetically different strains of rice ,and 1,000 varieties of mango. (B) The Western Ghats have a lesser amphibian species diversity than the Eastern Ghats . ( c ) Scandinavian country like Norway has a greater ecosystem diversity than India. (D) Biodiversity and its conservation are now vital environmental issues of international concern . (E) More and more people around the world the world begin to realise the critical importance of biodiversity for our survival and well - being on this planet.

NCERT EXEMPLAR-BIODIVERSITY AND CONSERVATION-Biodiversity And Conservation
  1. What could have triggered mass extinctions of species in the past ?

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  2. What accounts for the greater ecological diversity of India ?

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  3. According to David Tilman, greater the diversity, greater is the prime...

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  4. What does 'Red' indicate in the IUCN Red list (2004) ?

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  5. Explain as to how protection of biodiversity hot spots alone can reduc...

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  6. What is the difference between endemic and exotic species ?

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  7. How does species diversity differ from ecological diversity ?

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  8. Why is genetic variation important in the plant Rauwolfia vomitoria ?

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  9. What is Red Data Book ?

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  10. Define gene pool.

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  11. What does the term 'Frugivorous' mean ?

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  12. What is the expanded form of IUCN ?

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  13. Define the terms (i) Bioprospecting (ii) Endemism

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  14. What is common to the species shown in figures A and B ?

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  15. What is comman to the species shown in figures A and B ?

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  16. How is the presently occuring species extinction different from the ea...

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  17. Of the four major causes for the loss of biodiversity (Alien species ...

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  18. Discuss one example, based on your day-to-day observations, showing ho...

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  19. A species area curve is drawn by plotting the number of species agains...

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  20. Is it possible that productivity and diversity of a natural community ...

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